<template>
    <div>
      <!-- 面包屑导航 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
      <!-- 卡片视图 -->
      <el-card>
        <el-alert
          title="添加商品信息"
          type="info"
          center
          show-icon
          :closable="false"
        >
        </el-alert>
        <!-- 步骤进度条 -->
        <el-steps
          :space="200"
          :active="activeIndex - 0"
          finish-status="success"
          align-center
        >
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <el-form
          :model="addForm"
          :rules="addFormRules"
          ref="addFormRef"
          label-width="100px"
          label-position="top"
        >
          <!-- tab栏 -->
          <el-tabs
            :tab-position="'left'"
            v-model="activeIndex"
            :before-leave="beforeTabLeave"
            @tab-click="tabClicked"
          >
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.addprice"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.addweight"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.addnumber" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  :options="catelist"
                  :props="{
                    expandTrigger: 'hover',
                    ...cateProps,
                  }"
                  v-model="addForm.goods_cat"
                  @change="handleChange"
                >
                </el-cascader>
              </el-form-item>
            
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item
                v-for="item in manyTableData"
                :label="item.attr_name"
                :key="item.attr_id"
              >
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox
                    border
                    :label="cb"
                    v-for="(cb, i) in item.attr_vals"
                    :key="i"
                  ></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
             
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item
                :label="item.attr_name"
                v-for="item in onlyTableData"
                :key="item.attr_id"
              >
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>          
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload
                action="http://127.0.0.1:8888/api/private/v1/upload"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                list-type="picture"
                :headers="headerObj"
                :on-success="handleSuccess"
              >
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">
                  只能上传jpg/png文件，且不超过500kb
                </div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
              <el-button type="primary" class="addBtn" @click="addGood">
                添加商品</el-button
              >
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>
      <!-- //图片预览 -->
      <el-dialog title="图片预览 " :visible.sync="previewVisible" width="50%">
        <img :src="previewPath" alt="" class="previewImg" />
      </el-dialog>
    </div>
  </template>
        
  <script>
  import _ from 'lodash'
  export default {
    name: 'Add',
    data() {
      return {
        //步骤条进度
        activeIndex: '0',
        //添加商品的表单数据集
        addForm: {
          goods_name: '',
          goods_price:0,
          goods_weight:0,
          goods_number:0,
          // 商品所属的分类数组
          goods_cat: ['11'],
          pics: [], //图片路径的数组
          goods_introduce: '', //介绍
          attrs: [], //合并动态参数和静态属性
        },
        //数据验证
        addFormRules: {
          goods_name: [
            { required: true, message: '请输入商品名称', trigger: 'blur' },
          ],
          goods_price: [
            { required: true, message: '请输入商品价格', trigger: 'blur' },
            {
              pattern: /^\d+(\.(?!.*0$)\d{1,2})?$/,
              message: '商品价格不能小于零,且小数点后两位即可',
              trigger: 'blur',
            },
          ],
          goods_weight: [
            { required: true, message: '请输入商品重量', trigger: 'blur' },
            {
              pattern: /^\d+(\.(?!.*0$)\d{1,2})?$/,
              message: '商品重量不能小于零，且最多保留小数后两位',
              trigger: 'blur',
            },
          ],
          goods_number: [
            { required: true, message: '请输入商品数量', trigger: 'blur' },
            {
              pattern: /^[1-9]\d*$/,
              message: '商品数量应为正整数',
              trigger: 'blur',
            },
          ],
          goods_cat: [
            { required: true, message: '请选择商品分类', trigger: 'blur' },
          ],
        },
        // 商品分类列表
        catelist: [],
        cateProps: {
          label: 'cat_name',
          value: 'cat_id',
          children: 'children',
        },
        // 动态参数列表数据
        manyTableData: [],
        // 静态属性列表数据
        onlyTableData: [],
        //图片上传的请求头
        headerObj: {
          Authorization: window.sessionStorage.getItem('token'),
        },
        previewPath: '', //预览图片地址
        previewVisible: false, //预览图片
      }
    },
    created() {
      this.getCateList()
    },
    methods: {
      // 获取所有商品分类数据
      async getCateList() {
        const { data: res } = await this.$http.get('categories')
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        } else {
          this.catelist = res.data
        }
      },
      //选择器选项变化
      handleChange() {
        if (this.addForm.goods_cat.length !== 3) {
          this.addForm.goods_cat = []
        }
      },
      //离开当前tab页
      beforeTabLeave(activeName, oldActiveName) {
        if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
          this.$message.error('请先选择商品分类！')
          return false
        }
      },
      //tab栏点击事件
      async tabClicked() {
        //点击第二栏tab动态参数
        if (this.activeIndex === '1') {
          const { data: res } = await this.$http.get(
            `categories/${this.cateId}/attributes`,
            {
              params: { sel: 'many' },
            }
          )
          if (res.meta.status !== 200) {
            return this.$message.error(res.meta.msg)
          } else {
            res.data.forEach((item) => {
              item.attr_vals =
                item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
            })
            this.manyTableData = res.data
          }
        }
        //点击第三栏tab静态属性
        else if (this.activeIndex === '2') {
          const { data: res } = await this.$http.get(
            `categories/${this.cateId}/attributes`,
            { params: { sel: 'only' } }
          )
          if (res.meta.status !== 200) {
            this.$message.error(res.meta.msg)
          } else {
            this.onlyTableData = res.data
          }
        }
      },
      //图片预览效果
      handlePreview(file) {
        this.previewPath = file.response.data.url
        this.previewVisible = true
      },
      //移除图片
      handleRemove(file) {
        //获取图片路径
        const filePath = file.response.data.tmp_path
        //查找addform中图片位置
        const i = this.addForm.pics.findIndex((x) => {
          x.pic = filePath
        })
        //删除
        this.addForm.pics.splice(i, 1)
        console.log(this.addForm)
      },
      //图片上传成功
      handleSuccess(res) {
        if (res.meta.status !== 200) {
          this.$message.error(res.meta.msg)
        } else {
          //将图片路径拼接，添加到addform
          const picInfo = { pic: res.data.tmp_path }
          this.addForm.pics.push(picInfo)
          this.$message.success(res.meta.msg)
        }
      },
      //添加商品
      addGood() {
        this.$refs.addFormRef.validate(async (valid) => {
          if (!valid) {
            return this.$message.error('请填写必要的表单项！')
          }
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          // 处理动态参数
          this.manyTableData.forEach((item) => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(' '),
            }
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyTableData.forEach((item) => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          const { data: res } = await this.$http.post('goods', form)
  
          if (res.meta.status !== 201) {
            return this.$message.error(res.meta.msg)
          } else {
            this.$message.success(res.meta.msg)
            this.$router.push('/goods')
          }
        })
      },
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      },
      addprice(){
        return this.addForm.goods_price===0?' ':this.addForm.goods_price
      },
      addweight(){
       return this.addForm.goods_weight===0?' ':this.addForm.goods_weight
      },
       addnumber(){
       return this.addForm.goods_number===0?' ':this.addForm.goods_number
      }
    },
  }
  </script>
        
  <style  scoped>
  .el-input {
    width: 85%;
  }
  .el-form,
  .el-steps {
    margin-left: 100px;
  }
  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }
  .previewImg {
    width: 80%;
  }
  .addBtn {
    margin-top: 15px;
    float: right;
    margin-right: 15%;
  }
  
  </style>